add persistent proxy/visitor store with CRUD API and web UI (#5188)

pkg/config/source/aggregator.go

@@ -0,0 +1,117 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"errors"
+	"fmt"
+	"sort"
+	"sync"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+type Aggregator struct {
+	mu sync.RWMutex
+
+	configSource *ConfigSource
+	storeSource  *StoreSource
+}
+
+func NewAggregator(configSource *ConfigSource) *Aggregator {
+	if configSource == nil {
+		configSource = NewConfigSource()
+	}
+	return &Aggregator{
+		configSource: configSource,
+	}
+}
+
+func (a *Aggregator) SetStoreSource(storeSource *StoreSource) {
+	a.mu.Lock()
+	defer a.mu.Unlock()
+
+	a.storeSource = storeSource
+}
+
+func (a *Aggregator) ConfigSource() *ConfigSource {
+	return a.configSource
+}
+
+func (a *Aggregator) StoreSource() *StoreSource {
+	return a.storeSource
+}
+
+func (a *Aggregator) getSourcesLocked() []Source {
+	sources := make([]Source, 0, 2)
+	if a.configSource != nil {
+		sources = append(sources, a.configSource)
+	}
+	if a.storeSource != nil {
+		sources = append(sources, a.storeSource)
+	}
+	return sources
+}
+
+func (a *Aggregator) Load() ([]v1.ProxyConfigurer, []v1.VisitorConfigurer, error) {
+	a.mu.RLock()
+	entries := a.getSourcesLocked()
+	a.mu.RUnlock()
+
+	if len(entries) == 0 {
+		return nil, nil, errors.New("no sources configured")
+	}
+
+	proxyMap := make(map[string]v1.ProxyConfigurer)
+	visitorMap := make(map[string]v1.VisitorConfigurer)
+
+	for _, src := range entries {
+		proxies, visitors, err := src.Load()
+		if err != nil {
+			return nil, nil, fmt.Errorf("load source: %w", err)
+		}
+		for _, p := range proxies {
+			proxyMap[p.GetBaseConfig().Name] = p
+		}
+		for _, v := range visitors {
+			visitorMap[v.GetBaseConfig().Name] = v
+		}
+	}
+	proxies, visitors := a.mapsToSortedSlices(proxyMap, visitorMap)
+	return proxies, visitors, nil
+}
+
+func (a *Aggregator) mapsToSortedSlices(
+	proxyMap map[string]v1.ProxyConfigurer,
+	visitorMap map[string]v1.VisitorConfigurer,
+) ([]v1.ProxyConfigurer, []v1.VisitorConfigurer) {
+	proxies := make([]v1.ProxyConfigurer, 0, len(proxyMap))
+	for _, p := range proxyMap {
+		proxies = append(proxies, p)
+	}
+	sort.Slice(proxies, func(i, j int) bool {
+		return proxies[i].GetBaseConfig().Name < proxies[j].GetBaseConfig().Name
+	})
+
+	visitors := make([]v1.VisitorConfigurer, 0, len(visitorMap))
+	for _, v := range visitorMap {
+		visitors = append(visitors, v)
+	}
+	sort.Slice(visitors, func(i, j int) bool {
+		return visitors[i].GetBaseConfig().Name < visitors[j].GetBaseConfig().Name
+	})
+
+	return proxies, visitors
+}

pkg/config/source/aggregator_test.go

@@ -0,0 +1,217 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+// mockProxy creates a TCP proxy config for testing
+func mockProxy(name string) v1.ProxyConfigurer {
+	cfg := &v1.TCPProxyConfig{}
+	cfg.Name = name
+	cfg.Type = "tcp"
+	cfg.LocalPort = 8080
+	cfg.RemotePort = 9090
+	return cfg
+}
+
+// mockVisitor creates a STCP visitor config for testing
+func mockVisitor(name string) v1.VisitorConfigurer {
+	cfg := &v1.STCPVisitorConfig{}
+	cfg.Name = name
+	cfg.Type = "stcp"
+	cfg.ServerName = "test-server"
+	return cfg
+}
+
+func newTestStoreSource(t *testing.T) *StoreSource {
+	t.Helper()
+
+	path := filepath.Join(t.TempDir(), "store.json")
+	storeSource, err := NewStoreSource(StoreSourceConfig{Path: path})
+	require.NoError(t, err)
+	return storeSource
+}
+
+func newTestAggregator(t *testing.T, storeSource *StoreSource) *Aggregator {
+	t.Helper()
+
+	configSource := NewConfigSource()
+	agg := NewAggregator(configSource)
+	if storeSource != nil {
+		agg.SetStoreSource(storeSource)
+	}
+	return agg
+}
+
+func TestNewAggregator_CreatesConfigSourceWhenNil(t *testing.T) {
+	require := require.New(t)
+
+	agg := NewAggregator(nil)
+	require.NotNil(agg)
+	require.NotNil(agg.ConfigSource())
+	require.Nil(agg.StoreSource())
+}
+
+func TestNewAggregator_WithoutStore(t *testing.T) {
+	require := require.New(t)
+
+	configSource := NewConfigSource()
+	agg := NewAggregator(configSource)
+	require.NotNil(agg)
+	require.Same(configSource, agg.ConfigSource())
+	require.Nil(agg.StoreSource())
+}
+
+func TestNewAggregator_WithStore(t *testing.T) {
+	require := require.New(t)
+
+	storeSource := newTestStoreSource(t)
+	configSource := NewConfigSource()
+	agg := NewAggregator(configSource)
+	agg.SetStoreSource(storeSource)
+
+	require.Same(configSource, agg.ConfigSource())
+	require.Same(storeSource, agg.StoreSource())
+}
+
+func TestAggregator_SetStoreSource_Overwrite(t *testing.T) {
+	require := require.New(t)
+
+	agg := newTestAggregator(t, nil)
+	first := newTestStoreSource(t)
+	second := newTestStoreSource(t)
+
+	agg.SetStoreSource(first)
+	require.Same(first, agg.StoreSource())
+
+	agg.SetStoreSource(second)
+	require.Same(second, agg.StoreSource())
+
+	agg.SetStoreSource(nil)
+	require.Nil(agg.StoreSource())
+}
+
+func TestAggregator_MergeBySourceOrder(t *testing.T) {
+	require := require.New(t)
+
+	storeSource := newTestStoreSource(t)
+	agg := newTestAggregator(t, storeSource)
+
+	configSource := agg.ConfigSource()
+
+	configShared := mockProxy("shared").(*v1.TCPProxyConfig)
+	configShared.LocalPort = 1111
+	configOnly := mockProxy("only-in-config").(*v1.TCPProxyConfig)
+	configOnly.LocalPort = 1112
+
+	err := configSource.ReplaceAll([]v1.ProxyConfigurer{configShared, configOnly}, nil)
+	require.NoError(err)
+
+	storeShared := mockProxy("shared").(*v1.TCPProxyConfig)
+	storeShared.LocalPort = 2222
+	storeOnly := mockProxy("only-in-store").(*v1.TCPProxyConfig)
+	storeOnly.LocalPort = 2223
+	err = storeSource.AddProxy(storeShared)
+	require.NoError(err)
+	err = storeSource.AddProxy(storeOnly)
+	require.NoError(err)
+
+	proxies, visitors, err := agg.Load()
+	require.NoError(err)
+	require.Len(visitors, 0)
+	require.Len(proxies, 3)
+
+	var sharedProxy *v1.TCPProxyConfig
+	for _, p := range proxies {
+		if p.GetBaseConfig().Name == "shared" {
+			sharedProxy = p.(*v1.TCPProxyConfig)
+			break
+		}
+	}
+	require.NotNil(sharedProxy)
+	require.Equal(2222, sharedProxy.LocalPort)
+}
+
+func TestAggregator_DisabledEntryIsSourceLocalFilter(t *testing.T) {
+	require := require.New(t)
+
+	storeSource := newTestStoreSource(t)
+	agg := newTestAggregator(t, storeSource)
+	configSource := agg.ConfigSource()
+
+	lowProxy := mockProxy("shared-proxy").(*v1.TCPProxyConfig)
+	lowProxy.LocalPort = 1111
+	err := configSource.ReplaceAll([]v1.ProxyConfigurer{lowProxy}, nil)
+	require.NoError(err)
+
+	disabled := false
+	highProxy := mockProxy("shared-proxy").(*v1.TCPProxyConfig)
+	highProxy.LocalPort = 2222
+	highProxy.Enabled = &disabled
+	err = storeSource.AddProxy(highProxy)
+	require.NoError(err)
+
+	proxies, visitors, err := agg.Load()
+	require.NoError(err)
+	require.Len(proxies, 1)
+	require.Len(visitors, 0)
+
+	proxy := proxies[0].(*v1.TCPProxyConfig)
+	require.Equal("shared-proxy", proxy.Name)
+	require.Equal(1111, proxy.LocalPort)
+}
+
+func TestAggregator_VisitorMerge(t *testing.T) {
+	require := require.New(t)
+
+	storeSource := newTestStoreSource(t)
+	agg := newTestAggregator(t, storeSource)
+
+	err := agg.ConfigSource().ReplaceAll(nil, []v1.VisitorConfigurer{mockVisitor("visitor1")})
+	require.NoError(err)
+	err = storeSource.AddVisitor(mockVisitor("visitor2"))
+	require.NoError(err)
+
+	_, visitors, err := agg.Load()
+	require.NoError(err)
+	require.Len(visitors, 2)
+}
+
+func TestAggregator_Load_ReturnsDefensiveCopies(t *testing.T) {
+	require := require.New(t)
+
+	agg := newTestAggregator(t, nil)
+	err := agg.ConfigSource().ReplaceAll([]v1.ProxyConfigurer{mockProxy("ssh")}, nil)
+	require.NoError(err)
+
+	proxies, _, err := agg.Load()
+	require.NoError(err)
+	require.Len(proxies, 1)
+	require.Equal("ssh", proxies[0].GetBaseConfig().Name)
+
+	proxies[0].GetBaseConfig().Name = "alice.ssh"
+
+	proxies2, _, err := agg.Load()
+	require.NoError(err)
+	require.Len(proxies2, 1)
+	require.Equal("ssh", proxies2[0].GetBaseConfig().Name)
+}

pkg/config/source/base_source.go

@@ -0,0 +1,65 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"sync"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+// baseSource provides shared state and behavior for Source implementations.
+// It manages proxy/visitor storage.
+// Concrete types (ConfigSource, StoreSource) embed this struct.
+type baseSource struct {
+	mu sync.RWMutex
+
+	proxies  map[string]v1.ProxyConfigurer
+	visitors map[string]v1.VisitorConfigurer
+}
+
+func newBaseSource() baseSource {
+	return baseSource{
+		proxies:  make(map[string]v1.ProxyConfigurer),
+		visitors: make(map[string]v1.VisitorConfigurer),
+	}
+}
+
+// Load returns all enabled proxy and visitor configurations.
+// Configurations with Enabled explicitly set to false are filtered out.
+func (s *baseSource) Load() ([]v1.ProxyConfigurer, []v1.VisitorConfigurer, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	proxies := make([]v1.ProxyConfigurer, 0, len(s.proxies))
+	for _, p := range s.proxies {
+		// Filter out disabled proxies (nil or true means enabled)
+		if enabled := p.GetBaseConfig().Enabled; enabled != nil && !*enabled {
+			continue
+		}
+		proxies = append(proxies, p)
+	}
+
+	visitors := make([]v1.VisitorConfigurer, 0, len(s.visitors))
+	for _, v := range s.visitors {
+		// Filter out disabled visitors (nil or true means enabled)
+		if enabled := v.GetBaseConfig().Enabled; enabled != nil && !*enabled {
+			continue
+		}
+		visitors = append(visitors, v)
+	}
+
+	return cloneConfigurers(proxies, visitors)
+}

pkg/config/source/base_source_test.go

@@ -0,0 +1,48 @@
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+func TestBaseSourceLoadReturnsClonedConfigurers(t *testing.T) {
+	require := require.New(t)
+
+	src := NewConfigSource()
+
+	proxyCfg := &v1.TCPProxyConfig{
+		ProxyBaseConfig: v1.ProxyBaseConfig{
+			Name: "proxy1",
+			Type: "tcp",
+		},
+	}
+	visitorCfg := &v1.STCPVisitorConfig{
+		VisitorBaseConfig: v1.VisitorBaseConfig{
+			Name: "visitor1",
+			Type: "stcp",
+		},
+	}
+
+	err := src.ReplaceAll([]v1.ProxyConfigurer{proxyCfg}, []v1.VisitorConfigurer{visitorCfg})
+	require.NoError(err)
+
+	firstProxies, firstVisitors, err := src.Load()
+	require.NoError(err)
+	require.Len(firstProxies, 1)
+	require.Len(firstVisitors, 1)
+
+	// Mutate loaded objects as runtime completion would do.
+	firstProxies[0].Complete()
+	firstVisitors[0].Complete()
+
+	secondProxies, secondVisitors, err := src.Load()
+	require.NoError(err)
+	require.Len(secondProxies, 1)
+	require.Len(secondVisitors, 1)
+
+	require.Empty(secondProxies[0].GetBaseConfig().LocalIP)
+	require.Empty(secondVisitors[0].GetBaseConfig().BindAddr)
+}

pkg/config/source/clone.go

@@ -0,0 +1,43 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"fmt"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+func cloneConfigurers(
+	proxies []v1.ProxyConfigurer,
+	visitors []v1.VisitorConfigurer,
+) ([]v1.ProxyConfigurer, []v1.VisitorConfigurer, error) {
+	clonedProxies := make([]v1.ProxyConfigurer, 0, len(proxies))
+	clonedVisitors := make([]v1.VisitorConfigurer, 0, len(visitors))
+
+	for _, cfg := range proxies {
+		if cfg == nil {
+			return nil, nil, fmt.Errorf("proxy cannot be nil")
+		}
+		clonedProxies = append(clonedProxies, cfg.Clone())
+	}
+	for _, cfg := range visitors {
+		if cfg == nil {
+			return nil, nil, fmt.Errorf("visitor cannot be nil")
+		}
+		clonedVisitors = append(clonedVisitors, cfg.Clone())
+	}
+	return clonedProxies, clonedVisitors, nil
+}

pkg/config/source/config_source.go

@@ -0,0 +1,65 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"fmt"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+// ConfigSource implements Source for in-memory configuration.
+// All operations are thread-safe.
+type ConfigSource struct {
+	baseSource
+}
+
+func NewConfigSource() *ConfigSource {
+	return &ConfigSource{
+		baseSource: newBaseSource(),
+	}
+}
+
+// ReplaceAll replaces all proxy and visitor configurations atomically.
+func (s *ConfigSource) ReplaceAll(proxies []v1.ProxyConfigurer, visitors []v1.VisitorConfigurer) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	nextProxies := make(map[string]v1.ProxyConfigurer, len(proxies))
+	for _, p := range proxies {
+		if p == nil {
+			return fmt.Errorf("proxy cannot be nil")
+		}
+		name := p.GetBaseConfig().Name
+		if name == "" {
+			return fmt.Errorf("proxy name cannot be empty")
+		}
+		nextProxies[name] = p
+	}
+	nextVisitors := make(map[string]v1.VisitorConfigurer, len(visitors))
+	for _, v := range visitors {
+		if v == nil {
+			return fmt.Errorf("visitor cannot be nil")
+		}
+		name := v.GetBaseConfig().Name
+		if name == "" {
+			return fmt.Errorf("visitor name cannot be empty")
+		}
+		nextVisitors[name] = v
+	}
+	s.proxies = nextProxies
+	s.visitors = nextVisitors
+	return nil
+}

pkg/config/source/config_source_test.go

@@ -0,0 +1,173 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+func TestNewConfigSource(t *testing.T) {
+	require := require.New(t)
+
+	src := NewConfigSource()
+	require.NotNil(src)
+}
+
+func TestConfigSource_ReplaceAll(t *testing.T) {
+	require := require.New(t)
+
+	src := NewConfigSource()
+
+	err := src.ReplaceAll(
+		[]v1.ProxyConfigurer{mockProxy("proxy1"), mockProxy("proxy2")},
+		[]v1.VisitorConfigurer{mockVisitor("visitor1")},
+	)
+	require.NoError(err)
+
+	proxies, visitors, err := src.Load()
+	require.NoError(err)
+	require.Len(proxies, 2)
+	require.Len(visitors, 1)
+
+	// ReplaceAll again should replace everything
+	err = src.ReplaceAll(
+		[]v1.ProxyConfigurer{mockProxy("proxy3")},
+		nil,
+	)
+	require.NoError(err)
+
+	proxies, visitors, err = src.Load()
+	require.NoError(err)
+	require.Len(proxies, 1)
+	require.Len(visitors, 0)
+	require.Equal("proxy3", proxies[0].GetBaseConfig().Name)
+
+	// ReplaceAll with nil proxy should fail
+	err = src.ReplaceAll([]v1.ProxyConfigurer{nil}, nil)
+	require.Error(err)
+
+	// ReplaceAll with empty name proxy should fail
+	err = src.ReplaceAll([]v1.ProxyConfigurer{&v1.TCPProxyConfig{}}, nil)
+	require.Error(err)
+}
+
+func TestConfigSource_Load(t *testing.T) {
+	require := require.New(t)
+
+	src := NewConfigSource()
+
+	err := src.ReplaceAll(
+		[]v1.ProxyConfigurer{mockProxy("proxy1"), mockProxy("proxy2")},
+		[]v1.VisitorConfigurer{mockVisitor("visitor1")},
+	)
+	require.NoError(err)
+
+	proxies, visitors, err := src.Load()
+	require.NoError(err)
+	require.Len(proxies, 2)
+	require.Len(visitors, 1)
+}
+
+// TestConfigSource_Load_FiltersDisabled verifies that Load() filters out
+// proxies and visitors with Enabled explicitly set to false.
+func TestConfigSource_Load_FiltersDisabled(t *testing.T) {
+	require := require.New(t)
+
+	src := NewConfigSource()
+
+	disabled := false
+	enabled := true
+
+	// Create enabled proxy (nil Enabled = enabled by default)
+	enabledProxy := mockProxy("enabled-proxy")
+
+	// Create disabled proxy
+	disabledProxy := &v1.TCPProxyConfig{}
+	disabledProxy.Name = "disabled-proxy"
+	disabledProxy.Type = "tcp"
+	disabledProxy.Enabled = &disabled
+
+	// Create explicitly enabled proxy
+	explicitEnabledProxy := &v1.TCPProxyConfig{}
+	explicitEnabledProxy.Name = "explicit-enabled-proxy"
+	explicitEnabledProxy.Type = "tcp"
+	explicitEnabledProxy.Enabled = &enabled
+
+	// Create enabled visitor (nil Enabled = enabled by default)
+	enabledVisitor := mockVisitor("enabled-visitor")
+
+	// Create disabled visitor
+	disabledVisitor := &v1.STCPVisitorConfig{}
+	disabledVisitor.Name = "disabled-visitor"
+	disabledVisitor.Type = "stcp"
+	disabledVisitor.Enabled = &disabled
+
+	err := src.ReplaceAll(
+		[]v1.ProxyConfigurer{enabledProxy, disabledProxy, explicitEnabledProxy},
+		[]v1.VisitorConfigurer{enabledVisitor, disabledVisitor},
+	)
+	require.NoError(err)
+
+	// Load should filter out disabled configs
+	proxies, visitors, err := src.Load()
+	require.NoError(err)
+	require.Len(proxies, 2, "Should have 2 enabled proxies")
+	require.Len(visitors, 1, "Should have 1 enabled visitor")
+
+	// Verify the correct proxies are returned
+	proxyNames := make([]string, 0, len(proxies))
+	for _, p := range proxies {
+		proxyNames = append(proxyNames, p.GetBaseConfig().Name)
+	}
+	require.Contains(proxyNames, "enabled-proxy")
+	require.Contains(proxyNames, "explicit-enabled-proxy")
+	require.NotContains(proxyNames, "disabled-proxy")
+
+	// Verify the correct visitor is returned
+	require.Equal("enabled-visitor", visitors[0].GetBaseConfig().Name)
+}
+
+func TestConfigSource_ReplaceAll_DoesNotApplyRuntimeDefaults(t *testing.T) {
+	require := require.New(t)
+
+	src := NewConfigSource()
+
+	proxyCfg := &v1.TCPProxyConfig{}
+	proxyCfg.Name = "proxy1"
+	proxyCfg.Type = "tcp"
+	proxyCfg.LocalPort = 10080
+
+	visitorCfg := &v1.XTCPVisitorConfig{}
+	visitorCfg.Name = "visitor1"
+	visitorCfg.Type = "xtcp"
+	visitorCfg.ServerName = "server1"
+	visitorCfg.SecretKey = "secret"
+	visitorCfg.BindPort = 10081
+
+	err := src.ReplaceAll([]v1.ProxyConfigurer{proxyCfg}, []v1.VisitorConfigurer{visitorCfg})
+	require.NoError(err)
+
+	proxies, visitors, err := src.Load()
+	require.NoError(err)
+	require.Len(proxies, 1)
+	require.Len(visitors, 1)
+	require.Empty(proxies[0].GetBaseConfig().LocalIP)
+	require.Empty(visitors[0].GetBaseConfig().BindAddr)
+	require.Empty(visitors[0].(*v1.XTCPVisitorConfig).Protocol)
+}

pkg/config/source/source.go

@@ -0,0 +1,37 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+// Source is the interface for configuration sources.
+// A Source provides proxy and visitor configurations from various backends.
+// Aggregator currently uses the built-in config source as base and an optional
+// store source as higher-priority overlay.
+type Source interface {
+	// Load loads the proxy and visitor configurations from this source.
+	// Returns the loaded configurations and any error encountered.
+	// A disabled entry in one source is source-local filtering, not a cross-source
+	// tombstone for entries from lower-priority sources.
+	//
+	// Error handling contract with Aggregator:
+	//   - When err is nil, returned slices are consumed.
+	//   - When err is non-nil, Aggregator aborts the merge and returns the error.
+	//   - To publish best-effort or partial results, return those results with
+	//     err set to nil.
+	Load() (proxies []v1.ProxyConfigurer, visitors []v1.VisitorConfigurer, err error)
+}

pkg/config/source/store.go

@@ -0,0 +1,359 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+type StoreSourceConfig struct {
+	Path string `json:"path"`
+}
+
+type storeData struct {
+	Proxies  []v1.TypedProxyConfig   `json:"proxies,omitempty"`
+	Visitors []v1.TypedVisitorConfig `json:"visitors,omitempty"`
+}
+
+type StoreSource struct {
+	baseSource
+	config StoreSourceConfig
+}
+
+var (
+	ErrAlreadyExists = errors.New("already exists")
+	ErrNotFound      = errors.New("not found")
+)
+
+func NewStoreSource(cfg StoreSourceConfig) (*StoreSource, error) {
+	if cfg.Path == "" {
+		return nil, fmt.Errorf("path is required")
+	}
+
+	s := &StoreSource{
+		baseSource: newBaseSource(),
+		config:     cfg,
+	}
+
+	if err := s.loadFromFile(); err != nil {
+		if !os.IsNotExist(err) {
+			return nil, fmt.Errorf("failed to load existing data: %w", err)
+		}
+	}
+
+	return s, nil
+}
+
+func (s *StoreSource) loadFromFile() error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.loadFromFileUnlocked()
+}
+
+func (s *StoreSource) loadFromFileUnlocked() error {
+	data, err := os.ReadFile(s.config.Path)
+	if err != nil {
+		return err
+	}
+
+	var stored storeData
+	if err := v1.WithDisallowUnknownFields(false, func() error {
+		return json.Unmarshal(data, &stored)
+	}); err != nil {
+		return fmt.Errorf("failed to parse JSON: %w", err)
+	}
+
+	s.proxies = make(map[string]v1.ProxyConfigurer)
+	s.visitors = make(map[string]v1.VisitorConfigurer)
+
+	for _, tp := range stored.Proxies {
+		if tp.ProxyConfigurer != nil {
+			proxyCfg := tp.ProxyConfigurer
+			name := proxyCfg.GetBaseConfig().Name
+			if name == "" {
+				return fmt.Errorf("proxy name cannot be empty")
+			}
+			s.proxies[name] = proxyCfg
+		}
+	}
+
+	for _, tv := range stored.Visitors {
+		if tv.VisitorConfigurer != nil {
+			visitorCfg := tv.VisitorConfigurer
+			name := visitorCfg.GetBaseConfig().Name
+			if name == "" {
+				return fmt.Errorf("visitor name cannot be empty")
+			}
+			s.visitors[name] = visitorCfg
+		}
+	}
+
+	return nil
+}
+
+func (s *StoreSource) saveToFileUnlocked() error {
+	stored := storeData{
+		Proxies:  make([]v1.TypedProxyConfig, 0, len(s.proxies)),
+		Visitors: make([]v1.TypedVisitorConfig, 0, len(s.visitors)),
+	}
+
+	for _, p := range s.proxies {
+		stored.Proxies = append(stored.Proxies, v1.TypedProxyConfig{ProxyConfigurer: p})
+	}
+	for _, v := range s.visitors {
+		stored.Visitors = append(stored.Visitors, v1.TypedVisitorConfig{VisitorConfigurer: v})
+	}
+
+	data, err := json.MarshalIndent(stored, "", "  ")
+	if err != nil {
+		return fmt.Errorf("failed to marshal JSON: %w", err)
+	}
+
+	dir := filepath.Dir(s.config.Path)
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return fmt.Errorf("failed to create directory: %w", err)
+	}
+
+	tmpPath := s.config.Path + ".tmp"
+
+	f, err := os.OpenFile(tmpPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
+	if err != nil {
+		return fmt.Errorf("failed to create temp file: %w", err)
+	}
+
+	if _, err := f.Write(data); err != nil {
+		f.Close()
+		os.Remove(tmpPath)
+		return fmt.Errorf("failed to write temp file: %w", err)
+	}
+
+	if err := f.Sync(); err != nil {
+		f.Close()
+		os.Remove(tmpPath)
+		return fmt.Errorf("failed to sync temp file: %w", err)
+	}
+
+	if err := f.Close(); err != nil {
+		os.Remove(tmpPath)
+		return fmt.Errorf("failed to close temp file: %w", err)
+	}
+
+	if err := os.Rename(tmpPath, s.config.Path); err != nil {
+		os.Remove(tmpPath)
+		return fmt.Errorf("failed to rename temp file: %w", err)
+	}
+
+	return nil
+}
+
+func (s *StoreSource) AddProxy(proxy v1.ProxyConfigurer) error {
+	if proxy == nil {
+		return fmt.Errorf("proxy cannot be nil")
+	}
+
+	name := proxy.GetBaseConfig().Name
+	if name == "" {
+		return fmt.Errorf("proxy name cannot be empty")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if _, exists := s.proxies[name]; exists {
+		return fmt.Errorf("%w: proxy %q", ErrAlreadyExists, name)
+	}
+
+	s.proxies[name] = proxy
+
+	if err := s.saveToFileUnlocked(); err != nil {
+		delete(s.proxies, name)
+		return fmt.Errorf("failed to persist: %w", err)
+	}
+	return nil
+}
+
+func (s *StoreSource) UpdateProxy(proxy v1.ProxyConfigurer) error {
+	if proxy == nil {
+		return fmt.Errorf("proxy cannot be nil")
+	}
+
+	name := proxy.GetBaseConfig().Name
+	if name == "" {
+		return fmt.Errorf("proxy name cannot be empty")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	oldProxy, exists := s.proxies[name]
+	if !exists {
+		return fmt.Errorf("%w: proxy %q", ErrNotFound, name)
+	}
+
+	s.proxies[name] = proxy
+
+	if err := s.saveToFileUnlocked(); err != nil {
+		s.proxies[name] = oldProxy
+		return fmt.Errorf("failed to persist: %w", err)
+	}
+	return nil
+}
+
+func (s *StoreSource) RemoveProxy(name string) error {
+	if name == "" {
+		return fmt.Errorf("proxy name cannot be empty")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	oldProxy, exists := s.proxies[name]
+	if !exists {
+		return fmt.Errorf("%w: proxy %q", ErrNotFound, name)
+	}
+
+	delete(s.proxies, name)
+
+	if err := s.saveToFileUnlocked(); err != nil {
+		s.proxies[name] = oldProxy
+		return fmt.Errorf("failed to persist: %w", err)
+	}
+	return nil
+}
+
+func (s *StoreSource) GetProxy(name string) v1.ProxyConfigurer {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	p, exists := s.proxies[name]
+	if !exists {
+		return nil
+	}
+	return p
+}
+
+func (s *StoreSource) AddVisitor(visitor v1.VisitorConfigurer) error {
+	if visitor == nil {
+		return fmt.Errorf("visitor cannot be nil")
+	}
+
+	name := visitor.GetBaseConfig().Name
+	if name == "" {
+		return fmt.Errorf("visitor name cannot be empty")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if _, exists := s.visitors[name]; exists {
+		return fmt.Errorf("%w: visitor %q", ErrAlreadyExists, name)
+	}
+
+	s.visitors[name] = visitor
+
+	if err := s.saveToFileUnlocked(); err != nil {
+		delete(s.visitors, name)
+		return fmt.Errorf("failed to persist: %w", err)
+	}
+	return nil
+}
+
+func (s *StoreSource) UpdateVisitor(visitor v1.VisitorConfigurer) error {
+	if visitor == nil {
+		return fmt.Errorf("visitor cannot be nil")
+	}
+
+	name := visitor.GetBaseConfig().Name
+	if name == "" {
+		return fmt.Errorf("visitor name cannot be empty")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	oldVisitor, exists := s.visitors[name]
+	if !exists {
+		return fmt.Errorf("%w: visitor %q", ErrNotFound, name)
+	}
+
+	s.visitors[name] = visitor
+
+	if err := s.saveToFileUnlocked(); err != nil {
+		s.visitors[name] = oldVisitor
+		return fmt.Errorf("failed to persist: %w", err)
+	}
+	return nil
+}
+
+func (s *StoreSource) RemoveVisitor(name string) error {
+	if name == "" {
+		return fmt.Errorf("visitor name cannot be empty")
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	oldVisitor, exists := s.visitors[name]
+	if !exists {
+		return fmt.Errorf("%w: visitor %q", ErrNotFound, name)
+	}
+
+	delete(s.visitors, name)
+
+	if err := s.saveToFileUnlocked(); err != nil {
+		s.visitors[name] = oldVisitor
+		return fmt.Errorf("failed to persist: %w", err)
+	}
+	return nil
+}
+
+func (s *StoreSource) GetVisitor(name string) v1.VisitorConfigurer {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	v, exists := s.visitors[name]
+	if !exists {
+		return nil
+	}
+	return v
+}
+
+func (s *StoreSource) GetAllProxies() ([]v1.ProxyConfigurer, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]v1.ProxyConfigurer, 0, len(s.proxies))
+	for _, p := range s.proxies {
+		result = append(result, p)
+	}
+	return result, nil
+}
+
+func (s *StoreSource) GetAllVisitors() ([]v1.VisitorConfigurer, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]v1.VisitorConfigurer, 0, len(s.visitors))
+	for _, v := range s.visitors {
+		result = append(result, v)
+	}
+	return result, nil
+}

pkg/config/source/store_test.go

@@ -0,0 +1,144 @@
+// Copyright 2026 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+func setDisallowUnknownFieldsForStoreTest(t *testing.T, value bool) func() {
+	t.Helper()
+	v1.DisallowUnknownFieldsMu.Lock()
+	prev := v1.DisallowUnknownFields
+	v1.DisallowUnknownFields = value
+	v1.DisallowUnknownFieldsMu.Unlock()
+	return func() {
+		v1.DisallowUnknownFieldsMu.Lock()
+		v1.DisallowUnknownFields = prev
+		v1.DisallowUnknownFieldsMu.Unlock()
+	}
+}
+
+func getDisallowUnknownFieldsForStoreTest() bool {
+	v1.DisallowUnknownFieldsMu.Lock()
+	defer v1.DisallowUnknownFieldsMu.Unlock()
+	return v1.DisallowUnknownFields
+}
+
+func TestStoreSource_AddProxyAndVisitor_DoesNotApplyRuntimeDefaults(t *testing.T) {
+	require := require.New(t)
+
+	path := filepath.Join(t.TempDir(), "store.json")
+	storeSource, err := NewStoreSource(StoreSourceConfig{Path: path})
+	require.NoError(err)
+
+	proxyCfg := &v1.TCPProxyConfig{}
+	proxyCfg.Name = "proxy1"
+	proxyCfg.Type = "tcp"
+	proxyCfg.LocalPort = 10080
+
+	visitorCfg := &v1.XTCPVisitorConfig{}
+	visitorCfg.Name = "visitor1"
+	visitorCfg.Type = "xtcp"
+	visitorCfg.ServerName = "server1"
+	visitorCfg.SecretKey = "secret"
+	visitorCfg.BindPort = 10081
+
+	err = storeSource.AddProxy(proxyCfg)
+	require.NoError(err)
+	err = storeSource.AddVisitor(visitorCfg)
+	require.NoError(err)
+
+	gotProxy := storeSource.GetProxy("proxy1")
+	require.NotNil(gotProxy)
+	require.Empty(gotProxy.GetBaseConfig().LocalIP)
+
+	gotVisitor := storeSource.GetVisitor("visitor1")
+	require.NotNil(gotVisitor)
+	require.Empty(gotVisitor.GetBaseConfig().BindAddr)
+	require.Empty(gotVisitor.(*v1.XTCPVisitorConfig).Protocol)
+}
+
+func TestStoreSource_LoadFromFile_DoesNotApplyRuntimeDefaults(t *testing.T) {
+	require := require.New(t)
+
+	path := filepath.Join(t.TempDir(), "store.json")
+
+	proxyCfg := &v1.TCPProxyConfig{}
+	proxyCfg.Name = "proxy1"
+	proxyCfg.Type = "tcp"
+	proxyCfg.LocalPort = 10080
+
+	visitorCfg := &v1.XTCPVisitorConfig{}
+	visitorCfg.Name = "visitor1"
+	visitorCfg.Type = "xtcp"
+	visitorCfg.ServerName = "server1"
+	visitorCfg.SecretKey = "secret"
+	visitorCfg.BindPort = 10081
+
+	stored := storeData{
+		Proxies:  []v1.TypedProxyConfig{{ProxyConfigurer: proxyCfg}},
+		Visitors: []v1.TypedVisitorConfig{{VisitorConfigurer: visitorCfg}},
+	}
+	data, err := json.Marshal(stored)
+	require.NoError(err)
+	err = os.WriteFile(path, data, 0o600)
+	require.NoError(err)
+
+	storeSource, err := NewStoreSource(StoreSourceConfig{Path: path})
+	require.NoError(err)
+
+	gotProxy := storeSource.GetProxy("proxy1")
+	require.NotNil(gotProxy)
+	require.Empty(gotProxy.GetBaseConfig().LocalIP)
+
+	gotVisitor := storeSource.GetVisitor("visitor1")
+	require.NotNil(gotVisitor)
+	require.Empty(gotVisitor.GetBaseConfig().BindAddr)
+	require.Empty(gotVisitor.(*v1.XTCPVisitorConfig).Protocol)
+}
+
+func TestStoreSource_LoadFromFile_UnknownFieldsNotAffectedByAmbientStrictness(t *testing.T) {
+	require := require.New(t)
+
+	restore := setDisallowUnknownFieldsForStoreTest(t, true)
+	t.Cleanup(restore)
+
+	path := filepath.Join(t.TempDir(), "store.json")
+	raw := []byte(`{
+		"proxies": [
+			{"name":"proxy1","type":"tcp","localPort":10080,"unexpected":"value"}
+		],
+		"visitors": [
+			{"name":"visitor1","type":"xtcp","serverName":"server1","secretKey":"secret","bindPort":10081,"unexpected":"value"}
+		]
+	}`)
+	err := os.WriteFile(path, raw, 0o600)
+	require.NoError(err)
+
+	storeSource, err := NewStoreSource(StoreSourceConfig{Path: path})
+	require.NoError(err)
+
+	require.NotNil(storeSource.GetProxy("proxy1"))
+	require.NotNil(storeSource.GetVisitor("visitor1"))
+	require.True(getDisallowUnknownFieldsForStoreTest())
+}